Greek

καὶ αὐτὸς προελεύσεται ἐνώπιον αὐτοῦ ἐν πνεύματι δυνάμει Ἠλίου ἐπιστρέψαι καρδίας πατέρων ἐπὶ τέκνα ἀπειθεῖς φρονήσει δικαίων ἑτοιμάσαι Κυρίῳ λαὸν κατεσκευασμένον

Transliterated

kai autos proeleusetai enōpion autou en pneumati dynamei Ēliou epistrepsai kardias paterōn epi tekna apeitheis phronēsei dikaiōn hetoimasai Kyriō laon kateskeuasmenon

Literal English

And He will go forth before of Him’” in a spirit power of Elijah to turn heart fathers at children [the] disobedient [the] wisdom righteous to make ready Lord people prepared
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